INGREDIENTS
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Coarse salt and freshly ground pepper
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1 pound spaghetti
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1 tablespoon extra-virgin olive oil
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6 ounces slab bacon or pancetta, cut into 1/4-inch pieces
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3 cloves garlic, minced
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4 large egg yolks
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1/2 cup heavy cream
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1/2 cup grated Parmesan cheese, plus more for garnish if desired
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Zest of 1 lemon (optional)
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1/4 cup chopped flat-leaf parsley